<!DOCTYPE html>
<html>
<body>

<p>Do a global search, and test for "Hello" and "W3Schools" in a string:</p>

<button onclick="myFunction()">Try it</button>

<p id="demo"></p>

<script>
function myFunction() {
    var str = "Hello world!";

    //look for "Hello"
    var patt = /Hello/g;
    var result = patt.test(str);

    //look for "W3Schools"
    patt2 = /W3Schools/g;
    result2 = patt2.test(str);
    document.getElementById("demo").innerHTML = result + "<br>" + result2;
}
</script>

</body>
</html>